ncr peptides NCR - naturium-peptides-serum These peptides turn the bacteria into terminally differentiated non-replicative bacteroids

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NCR Peptides: Orchestrating Symbiosis and Beyond

NCR peptides, or nodule-specific cysteine-rich peptides, are a fascinating class of molecules playing a crucial role in plant-bacterial symbiosis, particularly in legumes作者：S Sankari·2022·被引用次数：64—... (NCR)peptidesthat guide the differentiation of endocytosed bacteria into nitrogen-fixing bacteroids. The sequences of theNCR peptidesare related to the .... These peptides are essential for guiding the differentiation of endocytosed bacteria, known as rhizobia, into nitrogen-fixing bacteroids within specialized structures called nodulesContract Research | Contract Development And .... The intricate interaction orchestrated by NCR peptides ensures the successful establishment of symbiosis, leading to enhanced nutrient acquisition for the plant. Beyond their primary role in symbiosis, research is also exploring the potential of NCR peptides as antimicrobial agents, highlighting their diverse biological activities.

#### The Role of NCR Peptides in Legume Symbiosis

The establishment of a symbiotic relationship between legumes and rhizobia is a complex process that relies heavily on precise molecular communication.Unexplored Arsenals of Legume Peptides With Potential for ... NCR peptides are central to this dialogue.作者：B Horváth·2023·被引用次数：32—NCR peptides possess highly conserved N-terminal signalswhich are recognized by the secretion complex of the nodule cells (Wang et al., 2010). Produced by the host plant within the root nodules, these peptides are delivered to the invading rhizobia. Their primary function is to induce a terminal differentiation in the bacteria, transforming them into non-replicative bacteroidsEarlier, it was shown thatNCR peptides direct an irreversible, terminal differentiation process of bacteriaresulting in enlargement and branching of nitrogen- .... This differentiation is critical for efficient nitrogen fixation, a process where atmospheric nitrogen is converted into ammonia, a form usable by the plant.

NCR peptides are characterized by their cysteine-rich nature and often possess a conserved N-terminal signal peptide, which is recognized by the secretion machinery of the nodule cells. This ensures their targeted delivery to the bacteria.Transcriptomic Identification of a Unique Set of Nodule ... While they guide the differentiation of rhizobia into bacteroids, it's important to note that NCR peptides do not typically kill the endosymbionts. Instead, at lower concentrations, they induce significant changes in bacterial morphology and physiology, promoting genome endoreduplication and leading to enlargement and branching.作者：F Saifi·2024·被引用次数：10—The identification of theNCR086/NCR314 peptide, essential for complete bacteroid differentiation, has extended the list of peptides, from a ... This controlled differentiation is key to the symbiotic outcome作者：EA Zorin·2022·被引用次数：21—NCR peptides are also predicted to be able to bind to proteinsand be ranked according to the so-called Boman index that reflects their protein- ....

The diversity of NCR peptides is notable, with many identified across different legume species. For instance, in *Medicago truncatula*, peptides like NCR169, NCR211, and NCR247 have been shown to be essential for symbiosis, with newer discoveries identifying additional crucial peptides such as NCR343 and NCR-new35Morphotype of bacteroids in different legumes correlates .... This abundance and diversity suggest a finely tuned regulatory system where different NCR peptides might have specific roles or act in concert to optimize the symbiotic process.

#### Mechanisms of Action and Bacterial Response

NCR peptides exert their effects through various mechanisms. They are known to permeabilize bacterial membranes, which can disrupt cellular functions. Furthermore, some NCR peptides exhibit bactericidal activities at higher concentrations, similar to antimicrobial peptides (AMPs) found in plant innate immunity, such as defensins. However, within the context of symbiosis, their action is more nuanced, promoting differentiation rather than outright killing.

Rhizobia are not passive recipients of NCR peptides; they can actively respond to and even counteract their effects. Some rhizobial strains possess mechanisms to promote the degradation of NCR peptides, potentially allowing them to escape terminal differentiation and tilt the symbiotic balance. This interplay highlights the dynamic nature of the plant-microbe interaction.

The sequences of NCR peptides are related to each other, suggesting an evolutionary origin from a common ancestral gene, possibly an antimicrobial peptide gene作者：EA Zorin·2022·被引用次数：21—NCR peptides are also predicted to be able to bind to proteinsand be ranked according to the so-called Boman index that reflects their protein- .... This shared ancestry might contribute to their diverse biological activitiesNCR peptides in plant–bacterial symbiosis - ScienceDirect.com.

#### Emerging Applications and Future Directions

Beyond their established role in symbiosis, the inherent antimicrobial properties of NCR peptides are opening up new avenues for research and applicationAn antimicrobial peptide essential for bacterial survival in .... Studies suggest that NCR molecules can be used directly as antimicrobial agents or incorporated into compositions for agricultural use, such as biopesticides. For example, specific NCR peptides have shown promise in controlling citrus greening disease, a significant threat to citrus production.

The ability of NCR peptides to bind to proteins, as indicated by analyses like the Boman index, further underscores their potential for targeted biological interactionsTranscriptomic Identification of a Unique Set of Nodule .... As research continues to unravel the complexities of NCR peptide function, their application in sustainable agriculture and potentially in human health is a promising area for future development.作者：EA Zorin·2022·被引用次数：21—NCR peptides are also predicted to be able to bind to proteinsand be ranked according to the so-called Boman index that reflects their protein- ... The ongoing identification of novel NCR peptides and the detailed study of their structure, function, and interaction with various microbial targets will undoubtedly lead to a deeper understanding and broader utilization of these remarkable plant-derived molecules.